Grate



C. F. SCHILLING.

GRATE.

rrucmou man an 28. m7.

Patented Nov. 16, 1920.

3 SHEETSSHEET l- Mmmam' C. F. SCHILLING.

GRATE.

APPLICATION FILED MAY28, 1911.

1,359, 1 1 1. Patented Nov. 16, 1920 3 SHEETS-SHEET 2.

c. F. SCHILLING.

GRATE.

APPLICATION. FILED IMY 28, I917. I v 1,359,1 1 1 Patented Nov. 16, 1920.

-a SHEETS- SHEET a.

UNITED STATES PATENT oF FlcE.

CHARLES FREDRICK SCHILLING, 0F LACOMBE, ALBERTA, CANADA.

GBATE.

Specification of Letters Patent. Patented N 16 1920 Application filedMay 28, 1917. Serial No. 171,532.

boiler furnaces and the like, and the objects of the invention are tofacilitate delivering air from the center of the fire radially orlaterally to the outside thereof, to permit of the draft being readilycontrolled, to simplify the arrangement of'the grate bars, and generallyto adapt the several parts to better perform the functions required ofthem.

lVith the above and other objects in view, the invention consistsessentially of the improved construction particularly described and setforth in the accompanying specification and drawings forming part of thesame.

. In the drawings:

Figure 1 is a longitudinal section through the front plate of a boiler.and showing the vertical grate bars in lowered position, the dottedlines indicating vertical grate .bars when elevated,

Fig. 2 is a plan View of the stationary grate bars and the verticalmovable grate bars.

Fi 3 is an enlar ed lon itudinal section through the front plate of theboiler.

and showing a vertical grate bar in the furnace, the bar being brokenintermediate of the length and in lowered position.

Fig. at is a side elevation partly sectional of an elevating rack andits coacting pinion.

Fig. 5 is a vertical section of a" guide designed to carry the elevatingrack and its coacting pinion.

Fig. 6 is an enlarged vertical section of one of the bars constitutingthe vertical grate.

Fig. 7 is a perspective view of the improved grate as seen in positionin a boiler setting.

Fig. 8 is a fragmentary perspective view of the stationary grate bars,showing the guides located between. the same to carry the movable gratebars.

Llke characters of reference refer to like parts in the several figures.

In the drawings, B represents a portion of a boiler setting of any usualdescription having a. grate provided with a plurality of removable gratebars 28, with which a pluralityzof equidistantly spaced verticallymovable gratebars 29 coact. V

-The bars 28 may be removably supported in any known manner forreplacement.-

The grate bars 28 constitute the horizontal grate and are adapted tooperatively support a plurality of guides 30 arranged in pairs, one ateach endof the grate bars 28, the said uides being embraced by adjacentpairs of ars 28, and being held from vertical displacement by a flange31 formed along the lateral edges of the guides and on gaging with theupper face of the grate bars 28, while the curvilinear projection 32located below each grate bar 28 engages with the lower face thereof, andassists in.

securing the guides in the desired position. Slidably mounted in eachguide 30 is a rack 33 provided at the upper end with a square orifice 34with which the lug 35 of a verticalgrate bar 29 engages, the said rackmeshing with the pinion 36 carried by the spindle 37 which is journaledin the curvilinear projection 32 of the guide 30 and extends through thefront of the boiler plate 38, where it is provided with a crank handle39 which permits of the spindle 37 being manually rotated.

Each vertical grate bar 29 consists of a vertically disposed bar 40formed integral with and depending from the longitudinally extending bar41, the bar 40 having a central longitudinally extending recessedportion and being provided'with slotsf4=2 in the lateral wall, throughwhich slots air is designed to be delivered to the grate.

It is desirable that all the grate bars 29 should be capable ofsimultaneous vertical movement, and to this end I provide each of thespindles 37 with a pinion 43, adapted to mesh with the rack 44 slidablymounted in the bracket 45 secured to and extending grapsversely acrossthe front plate 38 of the o1 er.

It will be understood that only one of the spindles 37 is provided witha crank handle 39, and (when rotated) motion is transmitted to thepinion 48 whichmovesthe rack i4; in a longitudinal direction,transmitting motion to theseveral pinions 43 and simultaneouslyantuating all the'grate bars 29.

The assembly of the grates will be readily understood from the foregoingdescription.

'VVhen this type of grate is in use stoking is performed in the usualmanner. Ifit is found desirable toincrease the draft and allow more airto enter the furnace then the crank handle 39 is mannally rotated, sothat the vertical grate bars 29 are elevated relatively to thegrate bars28, which constitutethe horizontal grate.

' Air now passes from the ash pit through the central recessed portionof the grate bars 40 and after'passing through the slots 42 in thelateral walls of the said bars the air delivered to the" body of fuelspread on the grate, and thus increases the combustion thereof. V 7

It Will be readily seen that the guide members 30 are arranged so thatthe racks cannot become displaced by unmeshing with the pinion 36.

This is accomplished by providing the said guide members with'back wallssuch as are illustrated at 46 in Fig. 5, and it will also be clear thatby supporting the guide I members 30 from the grate bars 2-8 constitutorproducts of combustion is greatly increased, while the saving in fuel isvery r a 7 V k What I claim as my invention is:

r l. A device of the class described comprising a plurality of spacedstationary grate bars, guides located between the grate bars at the endsthereof, a flange on the grate bar located between pairs of stationarybarshaving a .central recess and slots through its lateral walls, rackscarried by the movable bars meshing with the said pinions, and means forrotating all the pinions whereby the vertical grate bars will besimultaneously elevated.

2. The device claimed in claim 1, in which a bracket extendstransversely across the device, a rack mounted in the bracket andmovable longitudinally relatively thereto, pinions on all the spindlesmeshing with the last said rack, means on one of the spindles formanually rotating the spindle whereby the rack will be movedlongitudinally to simultaneously rotate all the remaining spindles andelevate the vertical grates, as and for the purpose specified.

In witness whereof I have hereunto set my hand in the presence of twowitnesses;

CHARLES FREDRHIK SCHILLING.

Witnesses:

MARY JOSEPHINE MURRAY, ALLAN W. MACDONALD.

